Welding electrode holder



W. J. KOINZAN WELDING ELECTRODE HOLDER Dec. z, 1947.

Filed July 20, 1945 Inventor Patented Dec. 2, 1947 UNITED STATE PATENT OFFICE 1 Claim.

My invention relates to improvements in welding electrode holders, the primary object in View being to provide a simply constructed, inexpensive holder adapted for quickly and easily locking an electrode therein, or releasing the same to drop out of the holder, and which is especially designed for utilizing a metal shield for the electrode, is adequately insulated and air-cooled, and light in weight yet strong and durable.

To the accomplishment of the above, and subordinate objects presently appearing, a preferred embodiment of my invention has been illustrated in the accompanying drawing, set forth in detail in the succeeding description, and defined in the claim appended hereto.

In said drawing:

Figure 1 is a view in side elevation of my improved welding electrode holder in the preferred embodiment thereof,

Figure 2 is a view in plan,

Figure 3 is a view in longitudinal section taken on the line 3 3 of Figure 2,

Figure 4 is a View in front end elevation,

Figure 5 is a View in transverse section tak-en on the line 5 5 of Figure 3, and

Figure 6 is a View in side elevation of the lock nut drawn to an enlarged scale.

Referring to the drawing by numerals, my invention as shown comprises a tubular handle 1, of any suitable length and diameter, provided with longitudinal rows of air inlet apertures 2 for cooling the interior thereof with atmospheric air. A tubular steel shield 3 extends forwardly and axially from the handle I with its rear end slidably and rotatably fitted in said handle. The tubular steel shield 3 forwardly of the handle I is provided with longitudinal rows of air inlet apertures 4 therein for the same purpose as the apertures 2, and adjacent its front end with a side aperture 5 through which one end of an electrode 5 may be inserted into the shield. The handle I may be formed of any suitable insulation material, preferably a plastic. In the rear end of said shield 3 and suitably fixed therein is a relatively shorter bushing 1 preferably of the same material as the Handle I. A tubular steel electrode-hold ing member 8 extends through the bushing 'I and is suitably fixed therein with its rear end projecting for a short distance o-ut of said bushing 'I and its front end terminating opposite the aperture 5 and closed by a cap piece 8' also of Steel, the capped end of said member being provided with a side opening 9 therein registering with a similaiopening I in the cap piece 8' and both openings registering with the aperture so that the electrode B inserted through said aperture may be projected into the capped end of said member with its inner end opposed ilat against the front of the cap piece 8.

A generally tubular metal cable-clampingV element il provided with an enlarged front end I 2 iitting in the handle I is xed in said handle in suitably spaced relation to the rear end of said electrode-holding member 8 by means of a screw I3 extending through said handle I into the enlarged end I2 of said element with its head countersunk in said handle. The bore I4 of the element II is threaded t0 an enlarged transversely concave socket I5 provided in the rear end of said element in the axis of said bore and into which the split ends IB of the usual insulated power cable Il may be spread and clamped by means to be described. The bore I4 of said element II is of substantially the same diameter as the internal diameter of the electrode-holding element 8. A combined cable and electrode-clamping rod I8, preferably of steel, is threaded into the rear end portion of the electrode-holding member 8 and into the bore I4 of the cable-clamping element I I and provided with a tapered rear end I9 adapted, when said rod I 8 is turned into said element I I, to enter between the split ends I6 of the power cable I'I and spread the same apart against the wall of the socket I5 to clamp said ends in said socket. The combined cable and electrode-clamping rod I8 is provided with a reduced front end section I9 adapted, when said rod is turned into the electrade-holding member 8. to engage the inner end of the electrode 6 and clamp said end against the front of the cap piece 8. A jam nut 2I is provided on said rod I 8 for turning against the front end of said element I I to lock said rod in cable-clamping position, said jam nut being provided with fingers 22 overlying the rear end of said member 8 and for use in turning the nut.

Referring now to the use and operation of the described invention. To assemble the same, the split ends I5 of the power cable II are first positioned in the socket I5 and the combined cable and electrode-clamping rod is turned into said element to insert the tapered end I9 thereof between said ends IB and clamp the same in place. The jam nut 2l is next turned against said element to lock said rod in clamping position. The cable-clamping element II is then inserted together with said rod I8 into the handle I and secured therein by the screw I3. The shield 3 is then grasped by one hand and said rod I8 turned into the threaded end of the electrodeholding member 8 until the shield 3 is drawn into the handle I a suitable distance such that the electrode 6 may be inserted in the manner described in fro-nt of the rod section 20. With the electrode 6 inserted, the handle I is turned further to tighten the rod section 29 against said electrode and clamp the same in place. As an optional procedure, the shield 3 may be rotated to extend 'said rod I8 into said member 8. As Will be seen, after the rod section'20 is in clamping position a slight turn of the handle I, or the shield 3, will suice to release the electrodei so that it Will drop out of the holder. Conversely, a slight turn of said hand-legliwilh: clamp a new electrode 6 in place.

The foregoing will, it is believedfsiifcetoimpart a clear understanding offthefstructuresuse and advantages of my invention Without further explanation.

Manifestly, the invention, as described, is susceptible of mo'dicationras regardsfstructure and combination of parts withoutdeparting-from; the l"inventive concept, and right 'is 1 herein :reserved to such modifications as fall Withn'thescopefof f the appended-claim.

`What I claim is: Anelectrode holder comprising a; tublar han- Vidie of insulation material, *a cable-clamping 'member in said handle ideta'chablysecured `therein and providedWithf-an internal socket-therein adapted to receivealsplit end of a power-'cable extended intor the rear en'd ofthe handle;a combined cableandelectrode-clamping rod having a ,portion threaded into-said membeirwithanend -interposedbetween said-splitends of the-cable to'clamp said'en'ds in-sai'd-'soeket-an'd including 4an eleetro'dee'clamping f opposite f end -portion Vextendingeut-of -the front end ofisaidhan'dlega tubular perforated shield surrounding said `rod with one end rotatably-and sli'dably-ifittedinfsaid front endofthe' handle and provided withafside opening therein adjacent the opposite end thereof, and means in said shield coacting with said threaded portion of said rod when the shield is rotated to clamp an electrode against said clamp- 5 ing opposite end of said rod, said means comprising a tubular electrode-holding member in said shield fixed thereto in surrounding relation to said rod and spaced from said shield to form an air `spaee'betvveen said Yshield and saidielectrode 'holdingmemben said'holding member having a front end side opening in one side thereof solely `ifor the insertion oi one end of an electrode there- ,throughxintoathe electrode-holding member, and also having a closed front end between which =15 rand:saidf'clamping end of said rod the electrode "REFERENCES CITED The following references are x of record a in athe ile` of this patent:

" UNITED STATES PATENTS Number Name Date :1,908,007 vBende s May.v.9, `1933 2,277,298 Carbis5 -Mar.:f24, :1,942 l2,282,316 Albert .May 12,\1942 12,309,886 Collins Oct/1:1943 2,330,931 Stafford ;Oet. 5,;1943 2,357,663 Klingenberg 1Sept.l..5, 1944 1,293,538 .Pierce .V .Oct.: 4, :.1919

'- FOREXGN PATENTS Number Country Date 40 399,584 p(.`reat`;l3ritain Oct. 12,1933 

